Information about the religious practices surrounding the Matres is limited to the stones on which their depictions and inscriptions are found, of which over 1,100 exist. The Germanic Matres have been connected with the later Germanic dísir, valkyries, and norns attested largely in 13th century sources.

Matres also appear on votive reliefs and inscriptions in other areas occupied by the Roman army, including southeast Gaul, as at Vertillum; in Spain and Portugal, where some twenty inscriptions are known, among them several ones which include local epithets like a dedication to the Matribus Gallaicis "to the Galician Mothers"; and also in the Romano-Celtic culture of Pannonia in the form of similar reliefs and inscriptions to the Nutrices Augustae, "the august Nurses" found in Roman sites of Ptuj, Lower Styria.